21873280

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1$

素因数の和:282

約数の個数: 128

約数和(自身を含む): 61689600

約数和(自身を除く): 39816320

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 32, 40, 44, 52, 55, 64, 65, 80, 88, 104, 110, 128, 130, 143, 160, 176, 208, 220, 239, 260, 286, 320, 352, 416, 440, 478, 520, 572, 640, 704, 715, 832, 880, 956, 1040, 1144, 1195, 1408, 1430, 1664, 1760, 1912, 2080, 2288, 2390, 2629, 2860, 3107, 3520, 3824, 4160, 4576, 4780, 5258, 5720, 6214, 7040, 7648, 8320, 9152, 9560, 10516, 11440, 12428, 13145, 15296, 15535, 18304, 19120, 21032, 22880, 24856, 26290, 30592, 31070, 34177, 38240, 42064, 45760, 49712, 52580, 62140, 68354, 76480, 84128, 91520, 99424, 105160, 124280, 136708, 152960, 168256, 170885, 198848, 210320, 248560, 273416, 336512, 341770, 397696, 420640, 497120, 546832, 683540, 841280, 994240, 1093664, 1367080, 1682560, 1988480, 2187328, 2734160, 4374656, 5468320, 10936640, 21873280]

約数ペア:

[(1, 21873280), (2, 10936640), (4, 5468320), (5, 4374656), (8, 2734160), (10, 2187328), (11, 1988480), (13, 1682560), (16, 1367080), (20, 1093664), (22, 994240), (26, 841280), (32, 683540), (40, 546832), (44, 497120), (52, 420640), (55, 397696), (64, 341770), (65, 336512), (80, 273416), (88, 248560), (104, 210320), (110, 198848), (128, 170885), (130, 168256), (143, 152960), (160, 136708), (176, 124280), (208, 105160), (220, 99424), (239, 91520), (260, 84128), (286, 76480), (320, 68354), (352, 62140), (416, 52580), (440, 49712), (478, 45760), (520, 42064), (572, 38240), (640, 34177), (704, 31070), (715, 30592), (832, 26290), (880, 24856), (956, 22880), (1040, 21032), (1144, 19120), (1195, 18304), (1408, 15535), (1430, 15296), (1664, 13145), (1760, 12428), (1912, 11440), (2080, 10516), (2288, 9560), (2390, 9152), (2629, 8320), (2860, 7648), (3107, 7040), (3520, 6214), (3824, 5720), (4160, 5258), (4576, 4780)]