49980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{17}}^1$

素因数の和:43

約数の個数: 72

約数和(自身を含む): 172368

約数和(自身を除く): 122388

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 28, 30, 34, 35, 42, 49, 51, 60, 68, 70, 84, 85, 98, 102, 105, 119, 140, 147, 170, 196, 204, 210, 238, 245, 255, 294, 340, 357, 420, 476, 490, 510, 588, 595, 714, 735, 833, 980, 1020, 1190, 1428, 1470, 1666, 1785, 2380, 2499, 2940, 3332, 3570, 4165, 4998, 7140, 8330, 9996, 12495, 16660, 24990, 49980]

約数ペア:

[(1, 49980), (2, 24990), (3, 16660), (4, 12495), (5, 9996), (6, 8330), (7, 7140), (10, 4998), (12, 4165), (14, 3570), (15, 3332), (17, 2940), (20, 2499), (21, 2380), (28, 1785), (30, 1666), (34, 1470), (35, 1428), (42, 1190), (49, 1020), (51, 980), (60, 833), (68, 735), (70, 714), (84, 595), (85, 588), (98, 510), (102, 490), (105, 476), (119, 420), (140, 357), (147, 340), (170, 294), (196, 255), (204, 245), (210, 238)]