20849140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:181

約数の個数: 96

約数和(自身を含む): 51438240

約数和(自身を除く): 30589100

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 53, 65, 68, 85, 89, 106, 130, 170, 178, 212, 221, 260, 265, 340, 356, 442, 445, 530, 689, 884, 890, 901, 1060, 1105, 1157, 1378, 1513, 1780, 1802, 2210, 2314, 2756, 3026, 3445, 3604, 4420, 4505, 4628, 4717, 5785, 6052, 6890, 7565, 9010, 9434, 11570, 11713, 13780, 15130, 18020, 18868, 19669, 23140, 23426, 23585, 30260, 39338, 46852, 47170, 58565, 61321, 78676, 80189, 94340, 98345, 117130, 122642, 160378, 196690, 234260, 245284, 306605, 320756, 393380, 400945, 613210, 801890, 1042457, 1226420, 1603780, 2084914, 4169828, 5212285, 10424570, 20849140]

約数ペア:

[(1, 20849140), (2, 10424570), (4, 5212285), (5, 4169828), (10, 2084914), (13, 1603780), (17, 1226420), (20, 1042457), (26, 801890), (34, 613210), (52, 400945), (53, 393380), (65, 320756), (68, 306605), (85, 245284), (89, 234260), (106, 196690), (130, 160378), (170, 122642), (178, 117130), (212, 98345), (221, 94340), (260, 80189), (265, 78676), (340, 61321), (356, 58565), (442, 47170), (445, 46852), (530, 39338), (689, 30260), (884, 23585), (890, 23426), (901, 23140), (1060, 19669), (1105, 18868), (1157, 18020), (1378, 15130), (1513, 13780), (1780, 11713), (1802, 11570), (2210, 9434), (2314, 9010), (2756, 7565), (3026, 6890), (3445, 6052), (3604, 5785), (4420, 4717), (4505, 4628)]