31469980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^2$

素因数の和:155

約数の個数: 72

約数和(自身を含む): 72509472

約数和(自身を除く): 41039492

約数列:

[1, 2, 4, 5, 10, 20, 23, 37, 43, 46, 74, 86, 92, 115, 148, 172, 185, 215, 230, 370, 430, 460, 740, 851, 860, 989, 1591, 1702, 1849, 1978, 3182, 3404, 3698, 3956, 4255, 4945, 6364, 7396, 7955, 8510, 9245, 9890, 15910, 17020, 18490, 19780, 31820, 36593, 36980, 42527, 68413, 73186, 85054, 136826, 146372, 170108, 182965, 212635, 273652, 342065, 365930, 425270, 684130, 731860, 850540, 1368260, 1573499, 3146998, 6293996, 7867495, 15734990, 31469980]

約数ペア:

[(1, 31469980), (2, 15734990), (4, 7867495), (5, 6293996), (10, 3146998), (20, 1573499), (23, 1368260), (37, 850540), (43, 731860), (46, 684130), (74, 425270), (86, 365930), (92, 342065), (115, 273652), (148, 212635), (172, 182965), (185, 170108), (215, 146372), (230, 136826), (370, 85054), (430, 73186), (460, 68413), (740, 42527), (851, 36980), (860, 36593), (989, 31820), (1591, 19780), (1702, 18490), (1849, 17020), (1978, 15910), (3182, 9890), (3404, 9245), (3698, 8510), (3956, 7955), (4255, 7396), (4945, 6364)]