21995730

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{677}}^1$

素因数の和:728

約数の個数: 72

約数和(自身を含む): 60446412

約数和(自身を除く): 38450682

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 19, 30, 38, 45, 57, 90, 95, 114, 171, 190, 285, 342, 361, 570, 677, 722, 855, 1083, 1354, 1710, 1805, 2031, 2166, 3249, 3385, 3610, 4062, 5415, 6093, 6498, 6770, 10155, 10830, 12186, 12863, 16245, 20310, 25726, 30465, 32490, 38589, 60930, 64315, 77178, 115767, 128630, 192945, 231534, 244397, 385890, 488794, 578835, 733191, 1157670, 1221985, 1466382, 2199573, 2443970, 3665955, 4399146, 7331910, 10997865, 21995730]

約数ペア:

[(1, 21995730), (2, 10997865), (3, 7331910), (5, 4399146), (6, 3665955), (9, 2443970), (10, 2199573), (15, 1466382), (18, 1221985), (19, 1157670), (30, 733191), (38, 578835), (45, 488794), (57, 385890), (90, 244397), (95, 231534), (114, 192945), (171, 128630), (190, 115767), (285, 77178), (342, 64315), (361, 60930), (570, 38589), (677, 32490), (722, 30465), (855, 25726), (1083, 20310), (1354, 16245), (1710, 12863), (1805, 12186), (2031, 10830), (2166, 10155), (3249, 6770), (3385, 6498), (3610, 6093), (4062, 5415)]