1638508720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{179}}^1\times {\mathrm{3691}}^1$

素因数の和:3914

約数の個数: 80

約数和(自身を含む): 3955461120

約数和(自身を除く): 2316952400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 179, 248, 310, 358, 496, 620, 716, 895, 1240, 1432, 1790, 2480, 2864, 3580, 3691, 5549, 7160, 7382, 11098, 14320, 14764, 18455, 22196, 27745, 29528, 36910, 44392, 55490, 59056, 73820, 88784, 110980, 114421, 147640, 221960, 228842, 295280, 443920, 457684, 572105, 660689, 915368, 1144210, 1321378, 1830736, 2288420, 2642756, 3303445, 4576840, 5285512, 6606890, 9153680, 10571024, 13213780, 20481359, 26427560, 40962718, 52855120, 81925436, 102406795, 163850872, 204813590, 327701744, 409627180, 819254360, 1638508720]

約数ペア:

[(1, 1638508720), (2, 819254360), (4, 409627180), (5, 327701744), (8, 204813590), (10, 163850872), (16, 102406795), (20, 81925436), (31, 52855120), (40, 40962718), (62, 26427560), (80, 20481359), (124, 13213780), (155, 10571024), (179, 9153680), (248, 6606890), (310, 5285512), (358, 4576840), (496, 3303445), (620, 2642756), (716, 2288420), (895, 1830736), (1240, 1321378), (1432, 1144210), (1790, 915368), (2480, 660689), (2864, 572105), (3580, 457684), (3691, 443920), (5549, 295280), (7160, 228842), (7382, 221960), (11098, 147640), (14320, 114421), (14764, 110980), (18455, 88784), (22196, 73820), (27745, 59056), (29528, 55490), (36910, 44392)]