21968440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{509}}^1$

素因数の和:616

約数の個数: 64

約数和(自身を含む): 53978400

約数和(自身を除く): 32009960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 83, 104, 130, 166, 260, 332, 415, 509, 520, 664, 830, 1018, 1079, 1660, 2036, 2158, 2545, 3320, 4072, 4316, 5090, 5395, 6617, 8632, 10180, 10790, 13234, 20360, 21580, 26468, 33085, 42247, 43160, 52936, 66170, 84494, 132340, 168988, 211235, 264680, 337976, 422470, 549211, 844940, 1098422, 1689880, 2196844, 2746055, 4393688, 5492110, 10984220, 21968440]

約数ペア:

[(1, 21968440), (2, 10984220), (4, 5492110), (5, 4393688), (8, 2746055), (10, 2196844), (13, 1689880), (20, 1098422), (26, 844940), (40, 549211), (52, 422470), (65, 337976), (83, 264680), (104, 211235), (130, 168988), (166, 132340), (260, 84494), (332, 66170), (415, 52936), (509, 43160), (520, 42247), (664, 33085), (830, 26468), (1018, 21580), (1079, 20360), (1660, 13234), (2036, 10790), (2158, 10180), (2545, 8632), (3320, 6617), (4072, 5395), (4316, 5090)]