20651940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{397}}^1$

素因数の和:446

約数の個数: 108

約数和(自身を含む): 66713556

約数和(自身を除く): 46061616

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 153, 170, 180, 204, 255, 289, 306, 340, 397, 510, 578, 612, 765, 794, 867, 1020, 1156, 1191, 1445, 1530, 1588, 1734, 1985, 2382, 2601, 2890, 3060, 3468, 3573, 3970, 4335, 4764, 5202, 5780, 5955, 6749, 7146, 7940, 8670, 10404, 11910, 13005, 13498, 14292, 17340, 17865, 20247, 23820, 26010, 26996, 33745, 35730, 40494, 52020, 60741, 67490, 71460, 80988, 101235, 114733, 121482, 134980, 202470, 229466, 242964, 303705, 344199, 404940, 458932, 573665, 607410, 688398, 1032597, 1147330, 1214820, 1376796, 1720995, 2065194, 2294660, 3441990, 4130388, 5162985, 6883980, 10325970, 20651940]

約数ペア:

[(1, 20651940), (2, 10325970), (3, 6883980), (4, 5162985), (5, 4130388), (6, 3441990), (9, 2294660), (10, 2065194), (12, 1720995), (15, 1376796), (17, 1214820), (18, 1147330), (20, 1032597), (30, 688398), (34, 607410), (36, 573665), (45, 458932), (51, 404940), (60, 344199), (68, 303705), (85, 242964), (90, 229466), (102, 202470), (153, 134980), (170, 121482), (180, 114733), (204, 101235), (255, 80988), (289, 71460), (306, 67490), (340, 60741), (397, 52020), (510, 40494), (578, 35730), (612, 33745), (765, 26996), (794, 26010), (867, 23820), (1020, 20247), (1156, 17865), (1191, 17340), (1445, 14292), (1530, 13498), (1588, 13005), (1734, 11910), (1985, 10404), (2382, 8670), (2601, 7940), (2890, 7146), (3060, 6749), (3468, 5955), (3573, 5780), (3970, 5202), (4335, 4764)]