21485960

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1663}}^1$

素因数の和:1710

約数の個数: 64

約数和(自身を含む): 53913600

約数和(自身を除く): 32427640

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 136, 152, 170, 190, 323, 340, 380, 646, 680, 760, 1292, 1615, 1663, 2584, 3230, 3326, 6460, 6652, 8315, 12920, 13304, 16630, 28271, 31597, 33260, 56542, 63194, 66520, 113084, 126388, 141355, 157985, 226168, 252776, 282710, 315970, 537149, 565420, 631940, 1074298, 1130840, 1263880, 2148596, 2685745, 4297192, 5371490, 10742980, 21485960]

約数ペア:

[(1, 21485960), (2, 10742980), (4, 5371490), (5, 4297192), (8, 2685745), (10, 2148596), (17, 1263880), (19, 1130840), (20, 1074298), (34, 631940), (38, 565420), (40, 537149), (68, 315970), (76, 282710), (85, 252776), (95, 226168), (136, 157985), (152, 141355), (170, 126388), (190, 113084), (323, 66520), (340, 63194), (380, 56542), (646, 33260), (680, 31597), (760, 28271), (1292, 16630), (1615, 13304), (1663, 12920), (2584, 8315), (3230, 6652), (3326, 6460)]