15504980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 33747840

約数和(自身を除く): 18242860

約数列:

[1, 2, 4, 5, 10, 20, 61, 71, 122, 142, 179, 244, 284, 305, 355, 358, 610, 710, 716, 895, 1220, 1420, 1790, 3580, 4331, 8662, 10919, 12709, 17324, 21655, 21838, 25418, 43310, 43676, 50836, 54595, 63545, 86620, 109190, 127090, 218380, 254180, 775249, 1550498, 3100996, 3876245, 7752490, 15504980]

約数ペア:

[(1, 15504980), (2, 7752490), (4, 3876245), (5, 3100996), (10, 1550498), (20, 775249), (61, 254180), (71, 218380), (122, 127090), (142, 109190), (179, 86620), (244, 63545), (284, 54595), (305, 50836), (355, 43676), (358, 43310), (610, 25418), (710, 21838), (716, 21655), (895, 17324), (1220, 12709), (1420, 10919), (1790, 8662), (3580, 4331)]