21415730

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:255

約数の個数: 64

約数和(自身を含む): 46448640

約数和(自身を除く): 25032910

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 70, 71, 139, 142, 155, 217, 278, 310, 355, 434, 497, 695, 710, 973, 994, 1085, 1390, 1946, 2170, 2201, 2485, 4309, 4402, 4865, 4970, 8618, 9730, 9869, 11005, 15407, 19738, 21545, 22010, 30163, 30814, 43090, 49345, 60326, 69083, 77035, 98690, 138166, 150815, 154070, 301630, 305939, 345415, 611878, 690830, 1529695, 2141573, 3059390, 4283146, 10707865, 21415730]

約数ペア:

[(1, 21415730), (2, 10707865), (5, 4283146), (7, 3059390), (10, 2141573), (14, 1529695), (31, 690830), (35, 611878), (62, 345415), (70, 305939), (71, 301630), (139, 154070), (142, 150815), (155, 138166), (217, 98690), (278, 77035), (310, 69083), (355, 60326), (434, 49345), (497, 43090), (695, 30814), (710, 30163), (973, 22010), (994, 21545), (1085, 19738), (1390, 15407), (1946, 11005), (2170, 9869), (2201, 9730), (2485, 8618), (4309, 4970), (4402, 4865)]