21090420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9013}}^1$

素因数の和:9041

約数の個数: 72

約数和(自身を含む): 68903016

約数和(自身を除く): 47812596

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 180, 195, 234, 260, 390, 468, 585, 780, 1170, 2340, 9013, 18026, 27039, 36052, 45065, 54078, 81117, 90130, 108156, 117169, 135195, 162234, 180260, 234338, 270390, 324468, 351507, 405585, 468676, 540780, 585845, 703014, 811170, 1054521, 1171690, 1406028, 1622340, 1757535, 2109042, 2343380, 3515070, 4218084, 5272605, 7030140, 10545210, 21090420]

約数ペア:

[(1, 21090420), (2, 10545210), (3, 7030140), (4, 5272605), (5, 4218084), (6, 3515070), (9, 2343380), (10, 2109042), (12, 1757535), (13, 1622340), (15, 1406028), (18, 1171690), (20, 1054521), (26, 811170), (30, 703014), (36, 585845), (39, 540780), (45, 468676), (52, 405585), (60, 351507), (65, 324468), (78, 270390), (90, 234338), (117, 180260), (130, 162234), (156, 135195), (180, 117169), (195, 108156), (234, 90130), (260, 81117), (390, 54078), (468, 45065), (585, 36052), (780, 27039), (1170, 18026), (2340, 9013)]