21153990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4931}}^1$

素因数の和:4965

約数の個数: 64

約数和(自身を含む): 59657472

約数和(自身を除く): 38503482

約数列:

[1, 2, 3, 5, 6, 10, 11, 13, 15, 22, 26, 30, 33, 39, 55, 65, 66, 78, 110, 130, 143, 165, 195, 286, 330, 390, 429, 715, 858, 1430, 2145, 4290, 4931, 9862, 14793, 24655, 29586, 49310, 54241, 64103, 73965, 108482, 128206, 147930, 162723, 192309, 271205, 320515, 325446, 384618, 542410, 641030, 705133, 813615, 961545, 1410266, 1627230, 1923090, 2115399, 3525665, 4230798, 7051330, 10576995, 21153990]

約数ペア:

[(1, 21153990), (2, 10576995), (3, 7051330), (5, 4230798), (6, 3525665), (10, 2115399), (11, 1923090), (13, 1627230), (15, 1410266), (22, 961545), (26, 813615), (30, 705133), (33, 641030), (39, 542410), (55, 384618), (65, 325446), (66, 320515), (78, 271205), (110, 192309), (130, 162723), (143, 147930), (165, 128206), (195, 108482), (286, 73965), (330, 64103), (390, 54241), (429, 49310), (715, 29586), (858, 24655), (1430, 14793), (2145, 9862), (4290, 4931)]