40001720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{397}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 98863200

約数和(自身を除く): 58861480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 229, 397, 440, 458, 794, 916, 1145, 1588, 1832, 1985, 2290, 2519, 3176, 3970, 4367, 4580, 5038, 7940, 8734, 9160, 10076, 12595, 15880, 17468, 20152, 21835, 25190, 34936, 43670, 50380, 87340, 90913, 100760, 174680, 181826, 363652, 454565, 727304, 909130, 1000043, 1818260, 2000086, 3636520, 4000172, 5000215, 8000344, 10000430, 20000860, 40001720]

約数ペア:

[(1, 40001720), (2, 20000860), (4, 10000430), (5, 8000344), (8, 5000215), (10, 4000172), (11, 3636520), (20, 2000086), (22, 1818260), (40, 1000043), (44, 909130), (55, 727304), (88, 454565), (110, 363652), (220, 181826), (229, 174680), (397, 100760), (440, 90913), (458, 87340), (794, 50380), (916, 43670), (1145, 34936), (1588, 25190), (1832, 21835), (1985, 20152), (2290, 17468), (2519, 15880), (3176, 12595), (3970, 10076), (4367, 9160), (4580, 8734), (5038, 7940)]