21107590

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:253

約数の個数: 64

約数和(自身を含む): 45785088

約数和(自身を除く): 24677498

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 70, 71, 137, 142, 155, 217, 274, 310, 355, 434, 497, 685, 710, 959, 994, 1085, 1370, 1918, 2170, 2201, 2485, 4247, 4402, 4795, 4970, 8494, 9590, 9727, 11005, 15407, 19454, 21235, 22010, 29729, 30814, 42470, 48635, 59458, 68089, 77035, 97270, 136178, 148645, 154070, 297290, 301537, 340445, 603074, 680890, 1507685, 2110759, 3015370, 4221518, 10553795, 21107590]

約数ペア:

[(1, 21107590), (2, 10553795), (5, 4221518), (7, 3015370), (10, 2110759), (14, 1507685), (31, 680890), (35, 603074), (62, 340445), (70, 301537), (71, 297290), (137, 154070), (142, 148645), (155, 136178), (217, 97270), (274, 77035), (310, 68089), (355, 59458), (434, 48635), (497, 42470), (685, 30814), (710, 29729), (959, 22010), (994, 21235), (1085, 19454), (1370, 15407), (1918, 11005), (2170, 9727), (2201, 9590), (2485, 8494), (4247, 4970), (4402, 4795)]