39899980

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 85843296

約数和(自身を除く): 45943316

約数列:

[1, 2, 4, 5, 10, 20, 97, 131, 157, 194, 262, 314, 388, 485, 524, 628, 655, 785, 970, 1310, 1570, 1940, 2620, 3140, 12707, 15229, 20567, 25414, 30458, 41134, 50828, 60916, 63535, 76145, 82268, 102835, 127070, 152290, 205670, 254140, 304580, 411340, 1994999, 3989998, 7979996, 9974995, 19949990, 39899980]

約数ペア:

[(1, 39899980), (2, 19949990), (4, 9974995), (5, 7979996), (10, 3989998), (20, 1994999), (97, 411340), (131, 304580), (157, 254140), (194, 205670), (262, 152290), (314, 127070), (388, 102835), (485, 82268), (524, 76145), (628, 63535), (655, 60916), (785, 50828), (970, 41134), (1310, 30458), (1570, 25414), (1940, 20567), (2620, 15229), (3140, 12707)]