19898320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{53}}^1$

素因数の和:117

約数の個数: 120

約数和(自身を含む): 53574696

約数和(自身を除く): 33676376

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 53, 65, 76, 80, 95, 104, 106, 130, 152, 190, 208, 212, 247, 260, 265, 304, 361, 380, 424, 494, 520, 530, 689, 722, 760, 848, 988, 1007, 1040, 1060, 1235, 1378, 1444, 1520, 1805, 1976, 2014, 2120, 2470, 2756, 2888, 3445, 3610, 3952, 4028, 4240, 4693, 4940, 5035, 5512, 5776, 6890, 7220, 8056, 9386, 9880, 10070, 11024, 13091, 13780, 14440, 16112, 18772, 19133, 19760, 20140, 23465, 26182, 27560, 28880, 37544, 38266, 40280, 46930, 52364, 55120, 65455, 75088, 76532, 80560, 93860, 95665, 104728, 130910, 153064, 187720, 191330, 209456, 248729, 261820, 306128, 375440, 382660, 497458, 523640, 765320, 994916, 1047280, 1243645, 1530640, 1989832, 2487290, 3979664, 4974580, 9949160, 19898320]

約数ペア:

[(1, 19898320), (2, 9949160), (4, 4974580), (5, 3979664), (8, 2487290), (10, 1989832), (13, 1530640), (16, 1243645), (19, 1047280), (20, 994916), (26, 765320), (38, 523640), (40, 497458), (52, 382660), (53, 375440), (65, 306128), (76, 261820), (80, 248729), (95, 209456), (104, 191330), (106, 187720), (130, 153064), (152, 130910), (190, 104728), (208, 95665), (212, 93860), (247, 80560), (260, 76532), (265, 75088), (304, 65455), (361, 55120), (380, 52364), (424, 46930), (494, 40280), (520, 38266), (530, 37544), (689, 28880), (722, 27560), (760, 26182), (848, 23465), (988, 20140), (1007, 19760), (1040, 19133), (1060, 18772), (1235, 16112), (1378, 14440), (1444, 13780), (1520, 13091), (1805, 11024), (1976, 10070), (2014, 9880), (2120, 9386), (2470, 8056), (2756, 7220), (2888, 6890), (3445, 5776), (3610, 5512), (3952, 5035), (4028, 4940), (4240, 4693)]