21221900

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:160

約数の個数: 108

約数和(自身を含む): 55215216

約数和(自身を除く): 33993316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 61, 70, 71, 98, 100, 122, 140, 142, 175, 196, 244, 245, 284, 305, 350, 355, 427, 490, 497, 610, 700, 710, 854, 980, 994, 1220, 1225, 1420, 1525, 1708, 1775, 1988, 2135, 2450, 2485, 2989, 3050, 3479, 3550, 4270, 4331, 4900, 4970, 5978, 6100, 6958, 7100, 8540, 8662, 9940, 10675, 11956, 12425, 13916, 14945, 17324, 17395, 21350, 21655, 24850, 29890, 30317, 34790, 42700, 43310, 49700, 59780, 60634, 69580, 74725, 86620, 86975, 108275, 121268, 149450, 151585, 173950, 212219, 216550, 298900, 303170, 347900, 424438, 433100, 606340, 757925, 848876, 1061095, 1515850, 2122190, 3031700, 4244380, 5305475, 10610950, 21221900]

約数ペア:

[(1, 21221900), (2, 10610950), (4, 5305475), (5, 4244380), (7, 3031700), (10, 2122190), (14, 1515850), (20, 1061095), (25, 848876), (28, 757925), (35, 606340), (49, 433100), (50, 424438), (61, 347900), (70, 303170), (71, 298900), (98, 216550), (100, 212219), (122, 173950), (140, 151585), (142, 149450), (175, 121268), (196, 108275), (244, 86975), (245, 86620), (284, 74725), (305, 69580), (350, 60634), (355, 59780), (427, 49700), (490, 43310), (497, 42700), (610, 34790), (700, 30317), (710, 29890), (854, 24850), (980, 21655), (994, 21350), (1220, 17395), (1225, 17324), (1420, 14945), (1525, 13916), (1708, 12425), (1775, 11956), (1988, 10675), (2135, 9940), (2450, 8662), (2485, 8540), (2989, 7100), (3050, 6958), (3479, 6100), (3550, 5978), (4270, 4970), (4331, 4900)]