19864840

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{223}}^1$

素因数の和:382

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 28035320

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 131, 136, 170, 223, 262, 340, 446, 524, 655, 680, 892, 1048, 1115, 1310, 1784, 2227, 2230, 2620, 3791, 4454, 4460, 5240, 7582, 8908, 8920, 11135, 15164, 17816, 18955, 22270, 29213, 30328, 37910, 44540, 58426, 75820, 89080, 116852, 146065, 151640, 233704, 292130, 496621, 584260, 993242, 1168520, 1986484, 2483105, 3972968, 4966210, 9932420, 19864840]

約数ペア:

[(1, 19864840), (2, 9932420), (4, 4966210), (5, 3972968), (8, 2483105), (10, 1986484), (17, 1168520), (20, 993242), (34, 584260), (40, 496621), (68, 292130), (85, 233704), (131, 151640), (136, 146065), (170, 116852), (223, 89080), (262, 75820), (340, 58426), (446, 44540), (524, 37910), (655, 30328), (680, 29213), (892, 22270), (1048, 18955), (1115, 17816), (1310, 15164), (1784, 11135), (2227, 8920), (2230, 8908), (2620, 7582), (3791, 5240), (4454, 4460)]