21007920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{271}}^1$

素因数の和:323

約数の個数: 160

約数和(自身を含む): 72852480

約数和(自身を除く): 51844560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 19, 20, 24, 30, 34, 38, 40, 48, 51, 57, 60, 68, 76, 80, 85, 95, 102, 114, 120, 136, 152, 170, 190, 204, 228, 240, 255, 271, 272, 285, 304, 323, 340, 380, 408, 456, 510, 542, 570, 646, 680, 760, 813, 816, 912, 969, 1020, 1084, 1140, 1292, 1355, 1360, 1520, 1615, 1626, 1938, 2040, 2168, 2280, 2584, 2710, 3230, 3252, 3876, 4065, 4080, 4336, 4560, 4607, 4845, 5149, 5168, 5420, 6460, 6504, 7752, 8130, 9214, 9690, 10298, 10840, 12920, 13008, 13821, 15447, 15504, 16260, 18428, 19380, 20596, 21680, 23035, 25745, 25840, 27642, 30894, 32520, 36856, 38760, 41192, 46070, 51490, 55284, 61788, 65040, 69105, 73712, 77235, 77520, 82384, 87533, 92140, 102980, 110568, 123576, 138210, 154470, 175066, 184280, 205960, 221136, 247152, 262599, 276420, 308940, 350132, 368560, 411920, 437665, 525198, 552840, 617880, 700264, 875330, 1050396, 1105680, 1235760, 1312995, 1400528, 1750660, 2100792, 2625990, 3501320, 4201584, 5251980, 7002640, 10503960, 21007920]

約数ペア:

[(1, 21007920), (2, 10503960), (3, 7002640), (4, 5251980), (5, 4201584), (6, 3501320), (8, 2625990), (10, 2100792), (12, 1750660), (15, 1400528), (16, 1312995), (17, 1235760), (19, 1105680), (20, 1050396), (24, 875330), (30, 700264), (34, 617880), (38, 552840), (40, 525198), (48, 437665), (51, 411920), (57, 368560), (60, 350132), (68, 308940), (76, 276420), (80, 262599), (85, 247152), (95, 221136), (102, 205960), (114, 184280), (120, 175066), (136, 154470), (152, 138210), (170, 123576), (190, 110568), (204, 102980), (228, 92140), (240, 87533), (255, 82384), (271, 77520), (272, 77235), (285, 73712), (304, 69105), (323, 65040), (340, 61788), (380, 55284), (408, 51490), (456, 46070), (510, 41192), (542, 38760), (570, 36856), (646, 32520), (680, 30894), (760, 27642), (813, 25840), (816, 25745), (912, 23035), (969, 21680), (1020, 20596), (1084, 19380), (1140, 18428), (1292, 16260), (1355, 15504), (1360, 15447), (1520, 13821), (1615, 13008), (1626, 12920), (1938, 10840), (2040, 10298), (2168, 9690), (2280, 9214), (2584, 8130), (2710, 7752), (3230, 6504), (3252, 6460), (3876, 5420), (4065, 5168), (4080, 5149), (4336, 4845), (4560, 4607)]