21709480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{503}}^1$

素因数の和:610

約数の個数: 64

約数和(自身を含む): 53343360

約数和(自身を除く): 31633880

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 83, 104, 130, 166, 260, 332, 415, 503, 520, 664, 830, 1006, 1079, 1660, 2012, 2158, 2515, 3320, 4024, 4316, 5030, 5395, 6539, 8632, 10060, 10790, 13078, 20120, 21580, 26156, 32695, 41749, 43160, 52312, 65390, 83498, 130780, 166996, 208745, 261560, 333992, 417490, 542737, 834980, 1085474, 1669960, 2170948, 2713685, 4341896, 5427370, 10854740, 21709480]

約数ペア:

[(1, 21709480), (2, 10854740), (4, 5427370), (5, 4341896), (8, 2713685), (10, 2170948), (13, 1669960), (20, 1085474), (26, 834980), (40, 542737), (52, 417490), (65, 333992), (83, 261560), (104, 208745), (130, 166996), (166, 130780), (260, 83498), (332, 65390), (415, 52312), (503, 43160), (520, 41749), (664, 32695), (830, 26156), (1006, 21580), (1079, 20120), (1660, 13078), (2012, 10790), (2158, 10060), (2515, 8632), (3320, 6539), (4024, 5395), (4316, 5030)]