21506490

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1213}}^1$

素因数の和:1423

約数の個数: 48

約数和(自身を含む): 56247048

約数和(自身を除く): 34740558

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 197, 394, 591, 985, 1182, 1213, 1773, 1970, 2426, 2955, 3546, 3639, 5910, 6065, 7278, 8865, 10917, 12130, 17730, 18195, 21834, 36390, 54585, 109170, 238961, 477922, 716883, 1194805, 1433766, 2150649, 2389610, 3584415, 4301298, 7168830, 10753245, 21506490]

約数ペア:

[(1, 21506490), (2, 10753245), (3, 7168830), (5, 4301298), (6, 3584415), (9, 2389610), (10, 2150649), (15, 1433766), (18, 1194805), (30, 716883), (45, 477922), (90, 238961), (197, 109170), (394, 54585), (591, 36390), (985, 21834), (1182, 18195), (1213, 17730), (1773, 12130), (1970, 10917), (2426, 8865), (2955, 7278), (3546, 6065), (3639, 5910)]