20730320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{643}}^1$

素因数の和:700

約数の個数: 80

約数和(自身を含む): 53663232

約数和(自身を除く): 32932912

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 643, 806, 1040, 1240, 1286, 1612, 2015, 2480, 2572, 3215, 3224, 4030, 5144, 6430, 6448, 8060, 8359, 10288, 12860, 16120, 16718, 19933, 25720, 32240, 33436, 39866, 41795, 51440, 66872, 79732, 83590, 99665, 133744, 159464, 167180, 199330, 259129, 318928, 334360, 398660, 518258, 668720, 797320, 1036516, 1295645, 1594640, 2073032, 2591290, 4146064, 5182580, 10365160, 20730320]

約数ペア:

[(1, 20730320), (2, 10365160), (4, 5182580), (5, 4146064), (8, 2591290), (10, 2073032), (13, 1594640), (16, 1295645), (20, 1036516), (26, 797320), (31, 668720), (40, 518258), (52, 398660), (62, 334360), (65, 318928), (80, 259129), (104, 199330), (124, 167180), (130, 159464), (155, 133744), (208, 99665), (248, 83590), (260, 79732), (310, 66872), (403, 51440), (496, 41795), (520, 39866), (620, 33436), (643, 32240), (806, 25720), (1040, 19933), (1240, 16718), (1286, 16120), (1612, 12860), (2015, 10288), (2480, 8359), (2572, 8060), (3215, 6448), (3224, 6430), (4030, 5144)]