642288400

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{123517}}^1$

素因数の和:123548

約数の個数: 60

約数和(自身を含む): 1661811172

約数和(自身を除く): 1019522772

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 130, 200, 208, 260, 325, 400, 520, 650, 1040, 1300, 2600, 5200, 123517, 247034, 494068, 617585, 988136, 1235170, 1605721, 1976272, 2470340, 3087925, 3211442, 4940680, 6175850, 6422884, 8028605, 9881360, 12351700, 12845768, 16057210, 24703400, 25691536, 32114420, 40143025, 49406800, 64228840, 80286050, 128457680, 160572100, 321144200, 642288400]

約数ペア:

[(1, 642288400), (2, 321144200), (4, 160572100), (5, 128457680), (8, 80286050), (10, 64228840), (13, 49406800), (16, 40143025), (20, 32114420), (25, 25691536), (26, 24703400), (40, 16057210), (50, 12845768), (52, 12351700), (65, 9881360), (80, 8028605), (100, 6422884), (104, 6175850), (130, 4940680), (200, 3211442), (208, 3087925), (260, 2470340), (325, 1976272), (400, 1605721), (520, 1235170), (650, 988136), (1040, 617585), (1300, 494068), (2600, 247034), (5200, 123517)]