400980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 1157184

約数和(自身を除く): 756204

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 41, 60, 82, 123, 163, 164, 205, 246, 326, 410, 489, 492, 615, 652, 815, 820, 978, 1230, 1630, 1956, 2445, 2460, 3260, 4890, 6683, 9780, 13366, 20049, 26732, 33415, 40098, 66830, 80196, 100245, 133660, 200490, 400980]

約数ペア:

[(1, 400980), (2, 200490), (3, 133660), (4, 100245), (5, 80196), (6, 66830), (10, 40098), (12, 33415), (15, 26732), (20, 20049), (30, 13366), (41, 9780), (60, 6683), (82, 4890), (123, 3260), (163, 2460), (164, 2445), (205, 1956), (246, 1630), (326, 1230), (410, 978), (489, 820), (492, 815), (615, 652)]