256529980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{521}}^1\times {\mathrm{3517}}^1$

素因数の和:4054

約数の個数: 48

約数和(自身を含む): 617029056

約数和(自身を除く): 360499076

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 521, 1042, 2084, 2605, 3517, 3647, 5210, 7034, 7294, 10420, 14068, 14588, 17585, 18235, 24619, 35170, 36470, 49238, 70340, 72940, 98476, 123095, 246190, 492380, 1832357, 3664714, 7329428, 9161785, 12826499, 18323570, 25652998, 36647140, 51305996, 64132495, 128264990, 256529980]

約数ペア:

[(1, 256529980), (2, 128264990), (4, 64132495), (5, 51305996), (7, 36647140), (10, 25652998), (14, 18323570), (20, 12826499), (28, 9161785), (35, 7329428), (70, 3664714), (140, 1832357), (521, 492380), (1042, 246190), (2084, 123095), (2605, 98476), (3517, 72940), (3647, 70340), (5210, 49238), (7034, 36470), (7294, 35170), (10420, 24619), (14068, 18235), (14588, 17585)]