20002750

素因数分解:

$2^1\times 5^3\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:166

約数の個数: 64

約数和(自身を含む): 40435200

約数和(自身を除く): 20432450

約数列:

[1, 2, 5, 10, 25, 29, 31, 50, 58, 62, 89, 125, 145, 155, 178, 250, 290, 310, 445, 725, 775, 890, 899, 1450, 1550, 1798, 2225, 2581, 2759, 3625, 3875, 4450, 4495, 5162, 5518, 7250, 7750, 8990, 11125, 12905, 13795, 22250, 22475, 25810, 27590, 44950, 64525, 68975, 80011, 112375, 129050, 137950, 160022, 224750, 322625, 344875, 400055, 645250, 689750, 800110, 2000275, 4000550, 10001375, 20002750]

約数ペア:

[(1, 20002750), (2, 10001375), (5, 4000550), (10, 2000275), (25, 800110), (29, 689750), (31, 645250), (50, 400055), (58, 344875), (62, 322625), (89, 224750), (125, 160022), (145, 137950), (155, 129050), (178, 112375), (250, 80011), (290, 68975), (310, 64525), (445, 44950), (725, 27590), (775, 25810), (890, 22475), (899, 22250), (1450, 13795), (1550, 12905), (1798, 11125), (2225, 8990), (2581, 7750), (2759, 7250), (3625, 5518), (3875, 5162), (4450, 4495)]