400013380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{521}}^1\times {\mathrm{2953}}^1$

素因数の和:3496

約数の個数: 48

約数和(自身を含む): 906688944

約数和(自身を除く): 506675564

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 521, 1042, 2084, 2605, 2953, 5210, 5906, 6773, 10420, 11812, 13546, 14765, 27092, 29530, 33865, 38389, 59060, 67730, 76778, 135460, 153556, 191945, 383890, 767780, 1538513, 3077026, 6154052, 7692565, 15385130, 20000669, 30770260, 40001338, 80002676, 100003345, 200006690, 400013380]

約数ペア:

[(1, 400013380), (2, 200006690), (4, 100003345), (5, 80002676), (10, 40001338), (13, 30770260), (20, 20000669), (26, 15385130), (52, 7692565), (65, 6154052), (130, 3077026), (260, 1538513), (521, 767780), (1042, 383890), (2084, 191945), (2605, 153556), (2953, 135460), (5210, 76778), (5906, 67730), (6773, 59060), (10420, 38389), (11812, 33865), (13546, 29530), (14765, 27092)]