21377720

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{839}}^1$

素因数の和:877

約数の個数: 96

約数和(自身を含む): 60328800

約数和(自身を除く): 38951080

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 49, 52, 56, 65, 70, 91, 98, 104, 130, 140, 182, 196, 245, 260, 280, 364, 392, 455, 490, 520, 637, 728, 839, 910, 980, 1274, 1678, 1820, 1960, 2548, 3185, 3356, 3640, 4195, 5096, 5873, 6370, 6712, 8390, 10907, 11746, 12740, 16780, 21814, 23492, 25480, 29365, 33560, 41111, 43628, 46984, 54535, 58730, 76349, 82222, 87256, 109070, 117460, 152698, 164444, 205555, 218140, 234920, 305396, 328888, 381745, 411110, 436280, 534443, 610792, 763490, 822220, 1068886, 1526980, 1644440, 2137772, 2672215, 3053960, 4275544, 5344430, 10688860, 21377720]

約数ペア:

[(1, 21377720), (2, 10688860), (4, 5344430), (5, 4275544), (7, 3053960), (8, 2672215), (10, 2137772), (13, 1644440), (14, 1526980), (20, 1068886), (26, 822220), (28, 763490), (35, 610792), (40, 534443), (49, 436280), (52, 411110), (56, 381745), (65, 328888), (70, 305396), (91, 234920), (98, 218140), (104, 205555), (130, 164444), (140, 152698), (182, 117460), (196, 109070), (245, 87256), (260, 82222), (280, 76349), (364, 58730), (392, 54535), (455, 46984), (490, 43628), (520, 41111), (637, 33560), (728, 29365), (839, 25480), (910, 23492), (980, 21814), (1274, 16780), (1678, 12740), (1820, 11746), (1960, 10907), (2548, 8390), (3185, 6712), (3356, 6370), (3640, 5873), (4195, 5096)]