31980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1$

素因数の和:66

約数の個数: 48

約数和(自身を含む): 98784

約数和(自身を除く): 66804

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 41, 52, 60, 65, 78, 82, 123, 130, 156, 164, 195, 205, 246, 260, 390, 410, 492, 533, 615, 780, 820, 1066, 1230, 1599, 2132, 2460, 2665, 3198, 5330, 6396, 7995, 10660, 15990, 31980]

約数ペア:

[(1, 31980), (2, 15990), (3, 10660), (4, 7995), (5, 6396), (6, 5330), (10, 3198), (12, 2665), (13, 2460), (15, 2132), (20, 1599), (26, 1230), (30, 1066), (39, 820), (41, 780), (52, 615), (60, 533), (65, 492), (78, 410), (82, 390), (123, 260), (130, 246), (156, 205), (164, 195)]