21388408220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{421}}^1\times {\mathrm{149423}}^1$

素因数の和:149870

約数の個数: 48

約数和(自身を含む): 47671037568

約数和(自身を除く): 26282629348

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 421, 842, 1684, 2105, 4210, 7157, 8420, 14314, 28628, 35785, 71570, 143140, 149423, 298846, 597692, 747115, 1494230, 2540191, 2988460, 5080382, 10160764, 12700955, 25401910, 50803820, 62907083, 125814166, 251628332, 314535415, 629070830, 1069420411, 1258141660, 2138840822, 4277681644, 5347102055, 10694204110, 21388408220]

約数ペア:

[(1, 21388408220), (2, 10694204110), (4, 5347102055), (5, 4277681644), (10, 2138840822), (17, 1258141660), (20, 1069420411), (34, 629070830), (68, 314535415), (85, 251628332), (170, 125814166), (340, 62907083), (421, 50803820), (842, 25401910), (1684, 12700955), (2105, 10160764), (4210, 5080382), (7157, 2988460), (8420, 2540191), (14314, 1494230), (28628, 747115), (35785, 597692), (71570, 298846), (143140, 149423)]