19631990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 22945930

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 70, 83, 109, 155, 166, 217, 218, 310, 415, 434, 545, 581, 763, 830, 1085, 1090, 1162, 1526, 2170, 2573, 2905, 3379, 3815, 5146, 5810, 6758, 7630, 9047, 12865, 16895, 18011, 18094, 23653, 25730, 33790, 36022, 45235, 47306, 63329, 90055, 90470, 118265, 126658, 180110, 236530, 280457, 316645, 560914, 633290, 1402285, 1963199, 2804570, 3926398, 9815995, 19631990]

約数ペア:

[(1, 19631990), (2, 9815995), (5, 3926398), (7, 2804570), (10, 1963199), (14, 1402285), (31, 633290), (35, 560914), (62, 316645), (70, 280457), (83, 236530), (109, 180110), (155, 126658), (166, 118265), (217, 90470), (218, 90055), (310, 63329), (415, 47306), (434, 45235), (545, 36022), (581, 33790), (763, 25730), (830, 23653), (1085, 18094), (1090, 18011), (1162, 16895), (1526, 12865), (2170, 9047), (2573, 7630), (2905, 6758), (3379, 5810), (3815, 5146)]