257123580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{4603}}^1$

素因数の和:4648

約数の個数: 144

約数和(自身を含む): 881758080

約数和(自身を除く): 624634500

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 28, 30, 35, 38, 42, 49, 57, 60, 70, 76, 84, 95, 98, 105, 114, 133, 140, 147, 190, 196, 210, 228, 245, 266, 285, 294, 380, 399, 420, 490, 532, 570, 588, 665, 735, 798, 931, 980, 1140, 1330, 1470, 1596, 1862, 1995, 2660, 2793, 2940, 3724, 3990, 4603, 4655, 5586, 7980, 9206, 9310, 11172, 13809, 13965, 18412, 18620, 23015, 27618, 27930, 32221, 46030, 55236, 55860, 64442, 69045, 87457, 92060, 96663, 128884, 138090, 161105, 174914, 193326, 225547, 262371, 276180, 322210, 349828, 386652, 437285, 451094, 483315, 524742, 612199, 644420, 676641, 874570, 902188, 966630, 1049484, 1127735, 1224398, 1311855, 1353282, 1749140, 1836597, 1933260, 2255470, 2448796, 2623710, 2706564, 3060995, 3383205, 3673194, 4285393, 4510940, 5247420, 6121990, 6766410, 7346388, 8570786, 9182985, 12243980, 12856179, 13532820, 17141572, 18365970, 21426965, 25712358, 36731940, 42853930, 51424716, 64280895, 85707860, 128561790, 257123580]

約数ペア:

[(1, 257123580), (2, 128561790), (3, 85707860), (4, 64280895), (5, 51424716), (6, 42853930), (7, 36731940), (10, 25712358), (12, 21426965), (14, 18365970), (15, 17141572), (19, 13532820), (20, 12856179), (21, 12243980), (28, 9182985), (30, 8570786), (35, 7346388), (38, 6766410), (42, 6121990), (49, 5247420), (57, 4510940), (60, 4285393), (70, 3673194), (76, 3383205), (84, 3060995), (95, 2706564), (98, 2623710), (105, 2448796), (114, 2255470), (133, 1933260), (140, 1836597), (147, 1749140), (190, 1353282), (196, 1311855), (210, 1224398), (228, 1127735), (245, 1049484), (266, 966630), (285, 902188), (294, 874570), (380, 676641), (399, 644420), (420, 612199), (490, 524742), (532, 483315), (570, 451094), (588, 437285), (665, 386652), (735, 349828), (798, 322210), (931, 276180), (980, 262371), (1140, 225547), (1330, 193326), (1470, 174914), (1596, 161105), (1862, 138090), (1995, 128884), (2660, 96663), (2793, 92060), (2940, 87457), (3724, 69045), (3990, 64442), (4603, 55860), (4655, 55236), (5586, 46030), (7980, 32221), (9206, 27930), (9310, 27618), (11172, 23015), (13809, 18620), (13965, 18412)]