21639860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{167}}^1$

素因数の和:237

約数の個数: 96

約数和(自身を含む): 54190080

約数和(自身を除く): 32550220

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 31, 38, 44, 55, 62, 76, 95, 110, 124, 155, 167, 190, 209, 220, 310, 334, 341, 380, 418, 589, 620, 668, 682, 835, 836, 1045, 1178, 1364, 1670, 1705, 1837, 2090, 2356, 2945, 3173, 3340, 3410, 3674, 4180, 5177, 5890, 6346, 6479, 6820, 7348, 9185, 10354, 11780, 12692, 12958, 15865, 18370, 20708, 25885, 25916, 31730, 32395, 34903, 36740, 51770, 56947, 63460, 64790, 69806, 98363, 103540, 113894, 129580, 139612, 174515, 196726, 227788, 284735, 349030, 393452, 491815, 569470, 698060, 983630, 1081993, 1138940, 1967260, 2163986, 4327972, 5409965, 10819930, 21639860]

約数ペア:

[(1, 21639860), (2, 10819930), (4, 5409965), (5, 4327972), (10, 2163986), (11, 1967260), (19, 1138940), (20, 1081993), (22, 983630), (31, 698060), (38, 569470), (44, 491815), (55, 393452), (62, 349030), (76, 284735), (95, 227788), (110, 196726), (124, 174515), (155, 139612), (167, 129580), (190, 113894), (209, 103540), (220, 98363), (310, 69806), (334, 64790), (341, 63460), (380, 56947), (418, 51770), (589, 36740), (620, 34903), (668, 32395), (682, 31730), (835, 25916), (836, 25885), (1045, 20708), (1178, 18370), (1364, 15865), (1670, 12958), (1705, 12692), (1837, 11780), (2090, 10354), (2356, 9185), (2945, 7348), (3173, 6820), (3340, 6479), (3410, 6346), (3674, 5890), (4180, 5177)]