28003920

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{211}}^1$

素因数の和:313

約数の個数: 160

約数和(自身を含む): 100945920

約数和(自身を除く): 72942000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 79, 80, 84, 105, 112, 120, 140, 158, 168, 210, 211, 237, 240, 280, 316, 336, 395, 420, 422, 474, 553, 560, 632, 633, 790, 840, 844, 948, 1055, 1106, 1185, 1264, 1266, 1477, 1580, 1659, 1680, 1688, 1896, 2110, 2212, 2370, 2532, 2765, 2954, 3160, 3165, 3318, 3376, 3792, 4220, 4424, 4431, 4740, 5064, 5530, 5908, 6320, 6330, 6636, 7385, 8295, 8440, 8848, 8862, 9480, 10128, 11060, 11816, 12660, 13272, 14770, 16590, 16669, 16880, 17724, 18960, 22120, 22155, 23632, 25320, 26544, 29540, 33180, 33338, 35448, 44240, 44310, 50007, 50640, 59080, 66360, 66676, 70896, 83345, 88620, 100014, 116683, 118160, 132720, 133352, 166690, 177240, 200028, 233366, 250035, 266704, 333380, 350049, 354480, 400056, 466732, 500070, 583415, 666760, 700098, 800112, 933464, 1000140, 1166830, 1333520, 1400196, 1750245, 1866928, 2000280, 2333660, 2800392, 3500490, 4000560, 4667320, 5600784, 7000980, 9334640, 14001960, 28003920]

約数ペア:

[(1, 28003920), (2, 14001960), (3, 9334640), (4, 7000980), (5, 5600784), (6, 4667320), (7, 4000560), (8, 3500490), (10, 2800392), (12, 2333660), (14, 2000280), (15, 1866928), (16, 1750245), (20, 1400196), (21, 1333520), (24, 1166830), (28, 1000140), (30, 933464), (35, 800112), (40, 700098), (42, 666760), (48, 583415), (56, 500070), (60, 466732), (70, 400056), (79, 354480), (80, 350049), (84, 333380), (105, 266704), (112, 250035), (120, 233366), (140, 200028), (158, 177240), (168, 166690), (210, 133352), (211, 132720), (237, 118160), (240, 116683), (280, 100014), (316, 88620), (336, 83345), (395, 70896), (420, 66676), (422, 66360), (474, 59080), (553, 50640), (560, 50007), (632, 44310), (633, 44240), (790, 35448), (840, 33338), (844, 33180), (948, 29540), (1055, 26544), (1106, 25320), (1185, 23632), (1264, 22155), (1266, 22120), (1477, 18960), (1580, 17724), (1659, 16880), (1680, 16669), (1688, 16590), (1896, 14770), (2110, 13272), (2212, 12660), (2370, 11816), (2532, 11060), (2765, 10128), (2954, 9480), (3160, 8862), (3165, 8848), (3318, 8440), (3376, 8295), (3792, 7385), (4220, 6636), (4424, 6330), (4431, 6320), (4740, 5908), (5064, 5530)]