28203420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{181}}^1$

素因数の和:260

約数の個数: 144

約数和(自身を含む): 94112928

約数和(自身を除く): 65909508

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 53, 60, 70, 84, 98, 105, 106, 140, 147, 159, 181, 196, 210, 212, 245, 265, 294, 318, 362, 371, 420, 490, 530, 543, 588, 636, 724, 735, 742, 795, 905, 980, 1060, 1086, 1113, 1267, 1470, 1484, 1590, 1810, 1855, 2172, 2226, 2534, 2597, 2715, 2940, 3180, 3620, 3710, 3801, 4452, 5068, 5194, 5430, 5565, 6335, 7420, 7602, 7791, 8869, 9593, 10388, 10860, 11130, 12670, 12985, 15204, 15582, 17738, 19005, 19186, 22260, 25340, 25970, 26607, 28779, 31164, 35476, 38010, 38372, 38955, 44345, 47965, 51940, 53214, 57558, 67151, 76020, 77910, 88690, 95930, 106428, 115116, 133035, 134302, 143895, 155820, 177380, 191860, 201453, 266070, 268604, 287790, 335755, 402906, 470057, 532140, 575580, 671510, 805812, 940114, 1007265, 1343020, 1410171, 1880228, 2014530, 2350285, 2820342, 4029060, 4700570, 5640684, 7050855, 9401140, 14101710, 28203420]

約数ペア:

[(1, 28203420), (2, 14101710), (3, 9401140), (4, 7050855), (5, 5640684), (6, 4700570), (7, 4029060), (10, 2820342), (12, 2350285), (14, 2014530), (15, 1880228), (20, 1410171), (21, 1343020), (28, 1007265), (30, 940114), (35, 805812), (42, 671510), (49, 575580), (53, 532140), (60, 470057), (70, 402906), (84, 335755), (98, 287790), (105, 268604), (106, 266070), (140, 201453), (147, 191860), (159, 177380), (181, 155820), (196, 143895), (210, 134302), (212, 133035), (245, 115116), (265, 106428), (294, 95930), (318, 88690), (362, 77910), (371, 76020), (420, 67151), (490, 57558), (530, 53214), (543, 51940), (588, 47965), (636, 44345), (724, 38955), (735, 38372), (742, 38010), (795, 35476), (905, 31164), (980, 28779), (1060, 26607), (1086, 25970), (1113, 25340), (1267, 22260), (1470, 19186), (1484, 19005), (1590, 17738), (1810, 15582), (1855, 15204), (2172, 12985), (2226, 12670), (2534, 11130), (2597, 10860), (2715, 10388), (2940, 9593), (3180, 8869), (3620, 7791), (3710, 7602), (3801, 7420), (4452, 6335), (5068, 5565), (5194, 5430)]