21455460

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:254

約数の個数: 144

約数和(自身を含む): 71823024

約数和(自身を除く): 50367564

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 53, 60, 65, 78, 90, 106, 117, 130, 156, 159, 173, 180, 195, 212, 234, 260, 265, 318, 346, 390, 468, 477, 519, 530, 585, 636, 689, 692, 780, 795, 865, 954, 1038, 1060, 1170, 1378, 1557, 1590, 1730, 1908, 2067, 2076, 2249, 2340, 2385, 2595, 2756, 3114, 3180, 3445, 3460, 4134, 4498, 4770, 5190, 6201, 6228, 6747, 6890, 7785, 8268, 8996, 9169, 9540, 10335, 10380, 11245, 12402, 13494, 13780, 15570, 18338, 20241, 20670, 22490, 24804, 26988, 27507, 31005, 31140, 33735, 36676, 40482, 41340, 44980, 45845, 55014, 62010, 67470, 80964, 82521, 91690, 101205, 110028, 119197, 124020, 134940, 137535, 165042, 183380, 202410, 238394, 275070, 330084, 357591, 404820, 412605, 476788, 550140, 595985, 715182, 825210, 1072773, 1191970, 1430364, 1650420, 1787955, 2145546, 2383940, 3575910, 4291092, 5363865, 7151820, 10727730, 21455460]

約数ペア:

[(1, 21455460), (2, 10727730), (3, 7151820), (4, 5363865), (5, 4291092), (6, 3575910), (9, 2383940), (10, 2145546), (12, 1787955), (13, 1650420), (15, 1430364), (18, 1191970), (20, 1072773), (26, 825210), (30, 715182), (36, 595985), (39, 550140), (45, 476788), (52, 412605), (53, 404820), (60, 357591), (65, 330084), (78, 275070), (90, 238394), (106, 202410), (117, 183380), (130, 165042), (156, 137535), (159, 134940), (173, 124020), (180, 119197), (195, 110028), (212, 101205), (234, 91690), (260, 82521), (265, 80964), (318, 67470), (346, 62010), (390, 55014), (468, 45845), (477, 44980), (519, 41340), (530, 40482), (585, 36676), (636, 33735), (689, 31140), (692, 31005), (780, 27507), (795, 26988), (865, 24804), (954, 22490), (1038, 20670), (1060, 20241), (1170, 18338), (1378, 15570), (1557, 13780), (1590, 13494), (1730, 12402), (1908, 11245), (2067, 10380), (2076, 10335), (2249, 9540), (2340, 9169), (2385, 8996), (2595, 8268), (2756, 7785), (3114, 6890), (3180, 6747), (3445, 6228), (3460, 6201), (4134, 5190), (4498, 4770)]