21004740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1913}}^1$

素因数の和:1989

約数の個数: 72

約数和(自身を含む): 64792728

約数和(自身を除く): 43787988

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 61, 90, 122, 180, 183, 244, 305, 366, 549, 610, 732, 915, 1098, 1220, 1830, 1913, 2196, 2745, 3660, 3826, 5490, 5739, 7652, 9565, 10980, 11478, 17217, 19130, 22956, 28695, 34434, 38260, 57390, 68868, 86085, 114780, 116693, 172170, 233386, 344340, 350079, 466772, 583465, 700158, 1050237, 1166930, 1400316, 1750395, 2100474, 2333860, 3500790, 4200948, 5251185, 7001580, 10502370, 21004740]

約数ペア:

[(1, 21004740), (2, 10502370), (3, 7001580), (4, 5251185), (5, 4200948), (6, 3500790), (9, 2333860), (10, 2100474), (12, 1750395), (15, 1400316), (18, 1166930), (20, 1050237), (30, 700158), (36, 583465), (45, 466772), (60, 350079), (61, 344340), (90, 233386), (122, 172170), (180, 116693), (183, 114780), (244, 86085), (305, 68868), (366, 57390), (549, 38260), (610, 34434), (732, 28695), (915, 22956), (1098, 19130), (1220, 17217), (1830, 11478), (1913, 10980), (2196, 9565), (2745, 7652), (3660, 5739), (3826, 5490)]