30991220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:261

約数の個数: 72

約数和(自身を含む): 72217656

約数和(自身を除く): 41226436

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 53, 65, 106, 130, 169, 173, 212, 260, 265, 338, 346, 530, 676, 689, 692, 845, 865, 1060, 1378, 1690, 1730, 2249, 2756, 3380, 3445, 3460, 4498, 6890, 8957, 8996, 9169, 11245, 13780, 17914, 18338, 22490, 29237, 35828, 36676, 44785, 44980, 45845, 58474, 89570, 91690, 116948, 119197, 146185, 179140, 183380, 238394, 292370, 476788, 584740, 595985, 1191970, 1549561, 2383940, 3099122, 6198244, 7747805, 15495610, 30991220]

約数ペア:

[(1, 30991220), (2, 15495610), (4, 7747805), (5, 6198244), (10, 3099122), (13, 2383940), (20, 1549561), (26, 1191970), (52, 595985), (53, 584740), (65, 476788), (106, 292370), (130, 238394), (169, 183380), (173, 179140), (212, 146185), (260, 119197), (265, 116948), (338, 91690), (346, 89570), (530, 58474), (676, 45845), (689, 44980), (692, 44785), (845, 36676), (865, 35828), (1060, 29237), (1378, 22490), (1690, 18338), (1730, 17914), (2249, 13780), (2756, 11245), (3380, 9169), (3445, 8996), (3460, 8957), (4498, 6890)]