21850140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:391

約数の個数: 96

約数和(自身を含む): 66749760

約数和(自身を除く): 44899620

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 109, 130, 156, 195, 218, 257, 260, 327, 390, 436, 514, 545, 654, 771, 780, 1028, 1090, 1285, 1308, 1417, 1542, 1635, 2180, 2570, 2834, 3084, 3270, 3341, 3855, 4251, 5140, 5668, 6540, 6682, 7085, 7710, 8502, 10023, 13364, 14170, 15420, 16705, 17004, 20046, 21255, 28013, 28340, 33410, 40092, 42510, 50115, 56026, 66820, 84039, 85020, 100230, 112052, 140065, 168078, 200460, 280130, 336156, 364169, 420195, 560260, 728338, 840390, 1092507, 1456676, 1680780, 1820845, 2185014, 3641690, 4370028, 5462535, 7283380, 10925070, 21850140]

約数ペア:

[(1, 21850140), (2, 10925070), (3, 7283380), (4, 5462535), (5, 4370028), (6, 3641690), (10, 2185014), (12, 1820845), (13, 1680780), (15, 1456676), (20, 1092507), (26, 840390), (30, 728338), (39, 560260), (52, 420195), (60, 364169), (65, 336156), (78, 280130), (109, 200460), (130, 168078), (156, 140065), (195, 112052), (218, 100230), (257, 85020), (260, 84039), (327, 66820), (390, 56026), (436, 50115), (514, 42510), (545, 40092), (654, 33410), (771, 28340), (780, 28013), (1028, 21255), (1090, 20046), (1285, 17004), (1308, 16705), (1417, 15420), (1542, 14170), (1635, 13364), (2180, 10023), (2570, 8502), (2834, 7710), (3084, 7085), (3270, 6682), (3341, 6540), (3855, 5668), (4251, 5140)]