213855980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^3\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:236

約数の個数: 96

約数和(自身を含む): 505397760

約数和(自身を除く): 291541780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 157, 169, 260, 310, 314, 338, 403, 620, 628, 676, 785, 806, 845, 1570, 1612, 1690, 2015, 2041, 2197, 3140, 3380, 4030, 4082, 4394, 4867, 5239, 8060, 8164, 8788, 9734, 10205, 10478, 10985, 19468, 20410, 20956, 21970, 24335, 26195, 26533, 40820, 43940, 48670, 52390, 53066, 63271, 68107, 97340, 104780, 106132, 126542, 132665, 136214, 253084, 265330, 272428, 316355, 340535, 344929, 530660, 632710, 681070, 689858, 822523, 1265420, 1362140, 1379716, 1645046, 1724645, 3290092, 3449290, 4112615, 6898580, 8225230, 10692799, 16450460, 21385598, 42771196, 53463995, 106927990, 213855980]

約数ペア:

[(1, 213855980), (2, 106927990), (4, 53463995), (5, 42771196), (10, 21385598), (13, 16450460), (20, 10692799), (26, 8225230), (31, 6898580), (52, 4112615), (62, 3449290), (65, 3290092), (124, 1724645), (130, 1645046), (155, 1379716), (157, 1362140), (169, 1265420), (260, 822523), (310, 689858), (314, 681070), (338, 632710), (403, 530660), (620, 344929), (628, 340535), (676, 316355), (785, 272428), (806, 265330), (845, 253084), (1570, 136214), (1612, 132665), (1690, 126542), (2015, 106132), (2041, 104780), (2197, 97340), (3140, 68107), (3380, 63271), (4030, 53066), (4082, 52390), (4394, 48670), (4867, 43940), (5239, 40820), (8060, 26533), (8164, 26195), (8788, 24335), (9734, 21970), (10205, 20956), (10478, 20410), (10985, 19468)]