21206250

素因数分解:

$2^1\times 3^2\times 5^5\times {\mathrm{13}}^1\times {\mathrm{29}}^1$

素因数の和:75

約数の個数: 144

約数和(自身を含む): 63980280

約数和(自身を除く): 42774030

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 25, 26, 29, 30, 39, 45, 50, 58, 65, 75, 78, 87, 90, 117, 125, 130, 145, 150, 174, 195, 225, 234, 250, 261, 290, 325, 375, 377, 390, 435, 450, 522, 585, 625, 650, 725, 750, 754, 870, 975, 1125, 1131, 1170, 1250, 1305, 1450, 1625, 1875, 1885, 1950, 2175, 2250, 2262, 2610, 2925, 3125, 3250, 3393, 3625, 3750, 3770, 4350, 4875, 5625, 5655, 5850, 6250, 6525, 6786, 7250, 8125, 9375, 9425, 9750, 10875, 11250, 11310, 13050, 14625, 16250, 16965, 18125, 18750, 18850, 21750, 24375, 28125, 28275, 29250, 32625, 33930, 36250, 40625, 47125, 48750, 54375, 56250, 56550, 65250, 73125, 81250, 84825, 90625, 94250, 108750, 121875, 141375, 146250, 163125, 169650, 181250, 235625, 243750, 271875, 282750, 326250, 365625, 424125, 471250, 543750, 706875, 731250, 815625, 848250, 1178125, 1413750, 1631250, 2120625, 2356250, 3534375, 4241250, 7068750, 10603125, 21206250]

約数ペア:

[(1, 21206250), (2, 10603125), (3, 7068750), (5, 4241250), (6, 3534375), (9, 2356250), (10, 2120625), (13, 1631250), (15, 1413750), (18, 1178125), (25, 848250), (26, 815625), (29, 731250), (30, 706875), (39, 543750), (45, 471250), (50, 424125), (58, 365625), (65, 326250), (75, 282750), (78, 271875), (87, 243750), (90, 235625), (117, 181250), (125, 169650), (130, 163125), (145, 146250), (150, 141375), (174, 121875), (195, 108750), (225, 94250), (234, 90625), (250, 84825), (261, 81250), (290, 73125), (325, 65250), (375, 56550), (377, 56250), (390, 54375), (435, 48750), (450, 47125), (522, 40625), (585, 36250), (625, 33930), (650, 32625), (725, 29250), (750, 28275), (754, 28125), (870, 24375), (975, 21750), (1125, 18850), (1131, 18750), (1170, 18125), (1250, 16965), (1305, 16250), (1450, 14625), (1625, 13050), (1875, 11310), (1885, 11250), (1950, 10875), (2175, 9750), (2250, 9425), (2262, 9375), (2610, 8125), (2925, 7250), (3125, 6786), (3250, 6525), (3393, 6250), (3625, 5850), (3750, 5655), (3770, 5625), (4350, 4875)]