640391640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{762371}}^1$

素因数の和:762392

約数の個数: 64

約数和(自身を含む): 2195631360

約数和(自身を除く): 1555239720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 762371, 1524742, 2287113, 3049484, 3811855, 4574226, 5336597, 6098968, 7623710, 9148452, 10673194, 11435565, 15247420, 16009791, 18296904, 21346388, 22871130, 26682985, 30494840, 32019582, 42692776, 45742260, 53365970, 64039164, 80048955, 91484520, 106731940, 128078328, 160097910, 213463880, 320195820, 640391640]

約数ペア:

[(1, 640391640), (2, 320195820), (3, 213463880), (4, 160097910), (5, 128078328), (6, 106731940), (7, 91484520), (8, 80048955), (10, 64039164), (12, 53365970), (14, 45742260), (15, 42692776), (20, 32019582), (21, 30494840), (24, 26682985), (28, 22871130), (30, 21346388), (35, 18296904), (40, 16009791), (42, 15247420), (56, 11435565), (60, 10673194), (70, 9148452), (84, 7623710), (105, 6098968), (120, 5336597), (140, 4574226), (168, 3811855), (210, 3049484), (280, 2287113), (420, 1524742), (840, 762371)]