21707440

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8753}}^1$

素因数の和:8797

約数の個数: 40

約数和(自身を含む): 52103808

約数和(自身を除く): 30396368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8753, 17506, 35012, 43765, 70024, 87530, 140048, 175060, 271343, 350120, 542686, 700240, 1085372, 1356715, 2170744, 2713430, 4341488, 5426860, 10853720, 21707440]

約数ペア:

[(1, 21707440), (2, 10853720), (4, 5426860), (5, 4341488), (8, 2713430), (10, 2170744), (16, 1356715), (20, 1085372), (31, 700240), (40, 542686), (62, 350120), (80, 271343), (124, 175060), (155, 140048), (248, 87530), (310, 70024), (496, 43765), (620, 35012), (1240, 17506), (2480, 8753)]