20721870

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1$

素因数の和:314

約数の個数: 96

約数和(自身を含む): 58968000

約数和(自身を除く): 38246130

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 39, 45, 65, 78, 89, 90, 117, 130, 178, 195, 199, 234, 267, 390, 398, 445, 534, 585, 597, 801, 890, 995, 1157, 1170, 1194, 1335, 1602, 1791, 1990, 2314, 2587, 2670, 2985, 3471, 3582, 4005, 5174, 5785, 5970, 6942, 7761, 8010, 8955, 10413, 11570, 12935, 15522, 17355, 17711, 17910, 20826, 23283, 25870, 34710, 35422, 38805, 46566, 52065, 53133, 77610, 88555, 104130, 106266, 116415, 159399, 177110, 230243, 232830, 265665, 318798, 460486, 531330, 690729, 796995, 1151215, 1381458, 1593990, 2072187, 2302430, 3453645, 4144374, 6907290, 10360935, 20721870]

約数ペア:

[(1, 20721870), (2, 10360935), (3, 6907290), (5, 4144374), (6, 3453645), (9, 2302430), (10, 2072187), (13, 1593990), (15, 1381458), (18, 1151215), (26, 796995), (30, 690729), (39, 531330), (45, 460486), (65, 318798), (78, 265665), (89, 232830), (90, 230243), (117, 177110), (130, 159399), (178, 116415), (195, 106266), (199, 104130), (234, 88555), (267, 77610), (390, 53133), (398, 52065), (445, 46566), (534, 38805), (585, 35422), (597, 34710), (801, 25870), (890, 23283), (995, 20826), (1157, 17910), (1170, 17711), (1194, 17355), (1335, 15522), (1602, 12935), (1791, 11570), (1990, 10413), (2314, 8955), (2587, 8010), (2670, 7761), (2985, 6942), (3471, 5970), (3582, 5785), (4005, 5174)]