21161380

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{179}}^1\times {\mathrm{257}}^1$

素因数の和:468

約数の個数: 48

約数和(自身を含む): 46811520

約数和(自身を除く): 25650140

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 179, 230, 257, 358, 460, 514, 716, 895, 1028, 1285, 1790, 2570, 3580, 4117, 5140, 5911, 8234, 11822, 16468, 20585, 23644, 29555, 41170, 46003, 59110, 82340, 92006, 118220, 184012, 230015, 460030, 920060, 1058069, 2116138, 4232276, 5290345, 10580690, 21161380]

約数ペア:

[(1, 21161380), (2, 10580690), (4, 5290345), (5, 4232276), (10, 2116138), (20, 1058069), (23, 920060), (46, 460030), (92, 230015), (115, 184012), (179, 118220), (230, 92006), (257, 82340), (358, 59110), (460, 46003), (514, 41170), (716, 29555), (895, 23644), (1028, 20585), (1285, 16468), (1790, 11822), (2570, 8234), (3580, 5911), (4117, 5140)]