19986320

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8059}}^1$

素因数の和:8103

約数の個数: 40

約数和(自身を含む): 47973120

約数和(自身を除く): 27986800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8059, 16118, 32236, 40295, 64472, 80590, 128944, 161180, 249829, 322360, 499658, 644720, 999316, 1249145, 1998632, 2498290, 3997264, 4996580, 9993160, 19986320]

約数ペア:

[(1, 19986320), (2, 9993160), (4, 4996580), (5, 3997264), (8, 2498290), (10, 1998632), (16, 1249145), (20, 999316), (31, 644720), (40, 499658), (62, 322360), (80, 249829), (124, 161180), (155, 128944), (248, 80590), (310, 64472), (496, 40295), (620, 32236), (1240, 16118), (2480, 8059)]