21262900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^3\times {\mathrm{31}}^1$

素因数の和:102

約数の個数: 72

約数和(自身を含む): 50274560

約数和(自身を除く): 29011660

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 31, 38, 50, 62, 76, 95, 100, 124, 155, 190, 310, 361, 380, 475, 589, 620, 722, 775, 950, 1178, 1444, 1550, 1805, 1900, 2356, 2945, 3100, 3610, 5890, 6859, 7220, 9025, 11191, 11780, 13718, 14725, 18050, 22382, 27436, 29450, 34295, 36100, 44764, 55955, 58900, 68590, 111910, 137180, 171475, 212629, 223820, 279775, 342950, 425258, 559550, 685900, 850516, 1063145, 1119100, 2126290, 4252580, 5315725, 10631450, 21262900]

約数ペア:

[(1, 21262900), (2, 10631450), (4, 5315725), (5, 4252580), (10, 2126290), (19, 1119100), (20, 1063145), (25, 850516), (31, 685900), (38, 559550), (50, 425258), (62, 342950), (76, 279775), (95, 223820), (100, 212629), (124, 171475), (155, 137180), (190, 111910), (310, 68590), (361, 58900), (380, 55955), (475, 44764), (589, 36100), (620, 34295), (722, 29450), (775, 27436), (950, 22382), (1178, 18050), (1444, 14725), (1550, 13718), (1805, 11780), (1900, 11191), (2356, 9025), (2945, 7220), (3100, 6859), (3610, 5890)]